The Jerrycan® is a small rear mount specific bag to max out your carrying space. It's narrow, only 2" wide, so your legs don't hit it when peddaling. Good for carrying some spares, tools, or some food.
Constructed with VX 21 fabric, padded ballistics nylon along the tube sections, yellow interior, Plastic HD side panel inserts, #5 YKK water resistant zipper, interior elastic keeps a multitool from rattling.
There are two Jerrycan models:
Regular - For most bikes, the seat post / top tube angle is slightly obtuse to fit lots of frames. If your bike has an acute angle there ( really sloping, dropped top tube) then it will just be pushed foreword a bit and take up more real estate along the top tube.

Williwaw Pogies deliver high performance and warmth in a low bulk package. Designed for everything from singletrack winter riding to commuting, the Williwaw's are ideal for temps from 0 F to 25 F.
Constructed with a 3 layer laminated material, developed by Revelate, composed of outer shell, foam for stiffness and insulation then a thin fleece against your hands. Williwaw's keep the bulk low and maintain their upright position on the handlebars.
The included bar end attachments internally fix the mitt to the ends of the bars and allow for quick tool-free removal while preventing the pogies from sagging when loaded up on rough terrain.
Features:
Composite material: 600 denier polyester outers, foam insulation, Fleece lining.
Adjustiable wrist gasket
Bar end plug attachment (plugs included)
Reflective trim.
Flat bars only